Adaptive battery charger with universal interface plate

Details Adaptive battery charger with universal interface plate Adaptive battery charger with universal interface plate

1996-10-30

1998-10-06

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

320160, D13117, H02J 700

Patent

active

058181970

ABSTRACT:
A universal interface plate has a predetermined and universal configuration suitable for connecting any one of a plurality of types of rechargeable batteries to the circuitry of a charging device. The universal plate is adapted to any type of rechargeable battery using an appropriate bay adapter, the bay adapter including a first interface for mounting the bay adapter to the universal interface plate and a second interface for accommodating a particular type of battery. The charging device utilizes a ramping charge method whereby batteries are initially charged at a low charging rate, thereby allowing safe charging of low and high capacity batteries utilizing a single charging algorithm. The charging rate is increased incrementally after determining whether the incremental current increase would cause the power to the battery to exceed the maximum power that can be handled by the bay. If the maximum charging rate is reached, charging is continued at the previous rate, otherwise the charging current is increased by the incremental amount thereby providing for rapid ramp-up of charging current for high capacity batteries while providing a low charging current for low capacity batteries, thus preventing overcurrent charging of low capacity batteries. During charging, the battery is monitored to determine whether a termination criterion is met.

REFERENCES:
patent: 4806840 (1989-02-01), Alexander et al.
patent: 5444353 (1995-08-01), Shinohara et al.
patent: 5550453 (1996-08-01), Bohne et al.
patent: 5592064 (1997-01-01), Morita
patent: 5617007 (1997-04-01), Keidl et al.
Alexander Batteries Communications Catalog 1994-95, Jul., 1994.

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